What's a 37mm Parrott Rifle? Parrott rifles came in 10lb, 20lb and up. They were never designated by bore diameter let alone metric bore dia. A 37mm bore would be a baby, half scale, gun.

To be honest we're not cannon experts, but that's what were told it is. Keep in mind this video is just for some fun, not much more . We hope it was entertaining if noting else, regardless of the cannon specs.